virtio: console: Unblock poll on port hot-unplug
When a port is hot-unplugged while an app is blocked on poll(), unblock the poll() and return. Signed-off-by: Amit Shah <amit.shah@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
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@ -663,6 +663,10 @@ static unsigned int port_fops_poll(struct file *filp, poll_table *wait)
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port = filp->private_data;
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poll_wait(filp, &port->waitqueue, wait);
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if (!port->guest_connected) {
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/* Port got unplugged */
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return POLLHUP;
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}
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ret = 0;
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if (!will_read_block(port))
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ret |= POLLIN | POLLRDNORM;
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